/*
 * Jeditable - jQuery in place edit plugin
 *
 * Copyright (c) 2006-2009 Mika Tuupola, Dylan Verheul
 *
 * Licensed under the MIT license:
 *   http://www.opensource.org/licenses/mit-license.php
 *
 * Project home:
 *   http://www.appelsiini.net/projects/jeditable
 *
 * Based on editable by Dylan Verheul <dylan_at_dyve.net>:
 *    http://www.dyve.net/jquery/?editable
 *
 */

/**
 * Version 1.7.1
 *
 * ** means there is basic unit tests for this parameter.
 *
 * @name  Jeditable
 * @type  jQuery
 * @param String  target             (POST) URL or function to send edited content to **
 * @param Hash    options            additional options
 * @param String  options[method]    method to use to send edited content (POST or PUT) **
 * @param Function options[callback] Function to run after submitting edited content **
 * @param String  options[name]      POST parameter name of edited content
 * @param String  options[id]        POST parameter name of edited div id
 * @param Hash    options[submitdata] Extra parameters to send when submitting edited content.
 * @param String  options[type]      text, textarea or select (or any 3rd party input type) **
 * @param Integer options[rows]      number of rows if using textarea **
 * @param Integer options[cols]      number of columns if using textarea **
 * @param Mixed   options[height]    'auto', 'none' or height in pixels **
 * @param Mixed   options[width]     'auto', 'none' or width in pixels **
 * @param String  options[loadurl]   URL to fetch input content before editing **
 * @param String  options[loadtype]  Request type for load url. Should be GET or POST.
 * @param String  options[loadtext]  Text to display while loading external content.
 * @param Mixed   options[loaddata]  Extra parameters to pass when fetching content before editing.
 * @param Mixed   options[data]      Or content given as paramameter. String or function.**
 * @param String  options[indicator] indicator html to show when saving
 * @param String  options[tooltip]   optional tooltip text via title attribute **
 * @param String  options[event]     jQuery event such as 'click' of 'dblclick' **
 * @param String  options[submit]    submit button value, empty means no button **
 * @param String  options[cancel]    cancel button value, empty means no button **
 * @param String  options[cssclass]  CSS class to apply to input form. 'inherit' to copy from parent. **
 * @param String  options[style]     Style to apply to input form 'inherit' to copy from parent. **
 * @param String  options[select]    true or false, when true text is highlighted ??
 * @param String  options[placeholder] Placeholder text or html to insert when element is empty. **
 * @param String  options[onblur]    'cancel', 'submit', 'ignore' or function ??
 *
 * @param Function options[onsubmit] function(settings, original) { ... } called before submit
 * @param Function options[onreset]  function(settings, original) { ... } called before reset
 * @param Function options[onerror]  function(settings, original, xhr) { ... } called on error
 *
 * @param Hash    options[ajaxoptions]  jQuery Ajax options. See docs.jquery.com.
 *
 */

(function ($) {

  $.fn.editable = function (target, options) {

    if ('disable' == target) {
      $(this).data('disabled.editable', true);
      return;
    }
    if ('enable' == target) {
      $(this).data('disabled.editable', false);
      return;
    }
    if ('destroy' == target) {
      $(this)
        .unbind($(this).data('event.editable'))
        .removeData('disabled.editable')
        .removeData('event.editable');
      return;
    }

    var settings = $.extend({}, $.fn.editable.defaults, {target:target}, options);

    /* setup some functions */
    var plugin = $.editable.types[settings.type].plugin || function () {
    };
    var submit = $.editable.types[settings.type].submit || function () {
    };
    var buttons = $.editable.types[settings.type].buttons
      || $.editable.types['defaults'].buttons;
    var content = $.editable.types[settings.type].content
      || $.editable.types['defaults'].content;
    var element = $.editable.types[settings.type].element
      || $.editable.types['defaults'].element;
    var reset = $.editable.types[settings.type].reset
      || $.editable.types['defaults'].reset;
    var callback = settings.callback || function () {
    };
    var onedit = settings.onedit || function () {
    };
    var onsubmit = settings.onsubmit || function () {
    };
    var onreset = settings.onreset || function () {
    };
    var onerror = settings.onerror || reset;

    /* show tooltip */
    if (settings.tooltip) {
      $(this).attr('title', settings.tooltip);
    }

    settings.autowidth = 'auto' == settings.width;
    settings.autoheight = 'auto' == settings.height;

    return this.each(function () {

      /* save this to self because this changes when scope changes */
      var self = this;

      /* inlined block elements lose their width and height after first edit */
      /* save them for later use as workaround */
      var savedwidth = $(self).width();
      var savedheight = $(self).height();

      /* save so it can be later used by $.editable('destroy') */
      $(this).data('event.editable', settings.event);

      /* if element is empty add something clickable (if requested) */
      if (!$.trim($(this).html())) {
        $(this).html(settings.placeholder);
      }

      $(this).bind(settings.event, function (e) {

        /* abort if disabled for this element */
        if (true === $(this).data('disabled.editable')) {
          return;
        }

        /* prevent throwing an exeption if edit field is clicked again */
        if (self.editing) {
          return;
        }

        /* abort if onedit hook returns false */
        if (false === onedit.apply(this, [settings, self])) {
          return;
        }

        /* prevent default action and bubbling */
        e.preventDefault();
        e.stopPropagation();

        /* remove tooltip */
        if (settings.tooltip) {
          $(self).removeAttr('title');
        }

        /* figure out how wide and tall we are, saved width and height */
        /* are workaround for http://dev.jquery.com/ticket/2190 */
        if (0 == $(self).width()) {
          //$(self).css('visibility', 'hidden');
          settings.width = savedwidth;
          settings.height = savedheight;
        } else {
          if (settings.width != 'none') {
            settings.width =
              settings.autowidth ? $(self).width() : settings.width;
          }
          if (settings.height != 'none') {
            settings.height =
              settings.autoheight ? $(self).height() : settings.height;
          }
        }
        //$(this).css('visibility', '');

        /* remove placeholder text, replace is here because of IE */
        if ($(this).html().toLowerCase().replace(/(;|")/g, '') ==
          settings.placeholder.toLowerCase().replace(/(;|")/g, '')) {
          $(this).html('');
        }

        self.editing = true;
        self.revert = $(self).html();
        $(self).html('');

        /* create the form object */
        var form = $('<form />');

        /* apply css or style or both */
        if (settings.cssclass) {
          if ('inherit' == settings.cssclass) {
            form.attr('class', $(self).attr('class'));
          } else {
            form.attr('class', settings.cssclass);
          }
        }

        if (settings.style) {
          if ('inherit' == settings.style) {
            form.attr('style', $(self).attr('style'));
            /* IE needs the second line or display wont be inherited */
            form.css('display', $(self).css('display'));
          } else {
            form.attr('style', settings.style);
          }
        }

        /* add main input element to form and store it in input */
        var input = element.apply(form, [settings, self]);

        /* set input content via POST, GET, given data or existing value */
        var input_content;

        if (settings.loadurl) {
          var t = setTimeout(function () {
            input.disabled = true;
            content.apply(form, [settings.loadtext, settings, self]);
          }, 100);

          var loaddata = {};
          loaddata[settings.id] = self.id;
          if ($.isFunction(settings.loaddata)) {
            $.extend(loaddata, settings.loaddata.apply(self, [self.revert, settings]));
          } else {
            $.extend(loaddata, settings.loaddata);
          }
          $.ajax({
            type:settings.loadtype,
            url:settings.loadurl,
            data:loaddata,
            async:false,
            success:function (result) {
              window.clearTimeout(t);
              input_content = result;
              input.disabled = false;
            }
          });
        } else if (settings.data) {
          input_content = settings.data;
          if ($.isFunction(settings.data)) {
            input_content = settings.data.apply(self, [self.revert, settings]);
          }
        } else {
          input_content = self.revert;
        }
        content.apply(form, [input_content, settings, self]);

        input.attr('name', settings.name);

        /* add buttons to the form */
        buttons.apply(form, [settings, self]);

        /* add created form to self */
        $(self).append(form);

        /* attach 3rd party plugin if requested */
        plugin.apply(form, [settings, self]);

        /* focus to first visible form element */
        $(':input:visible:enabled:first', form).focus();

        /* highlight input contents when requested */
        if (settings.select) {
          input.select();
        }

        /* discard changes if pressing esc */
        input.keydown(function (e) {
          if (e.keyCode == 27) {
            e.preventDefault();
            //self.reset();
            reset.apply(form, [settings, self]);
          }
        });

        /* discard, submit or nothing with changes when clicking outside */
        /* do nothing is usable when navigating with tab */
        var t;
        if ('cancel' == settings.onblur) {
          input.blur(function (e) {
            /* prevent canceling if submit was clicked */
            t = setTimeout(function () {
              reset.apply(form, [settings, self]);
            }, 500);
          });
        } else if ('submit' == settings.onblur) {
          input.blur(function (e) {
            /* prevent double submit if submit was clicked */
            t = setTimeout(function () {
              form.submit();
            }, 200);
          });
        } else if ($.isFunction(settings.onblur)) {
          input.blur(function (e) {
            settings.onblur.apply(self, [input.val(), settings]);
          });
        } else {
          input.blur(function (e) {
            /* TODO: maybe something here */
          });
        }

        form.submit(function (e) {

          if (t) {
            clearTimeout(t);
          }

          /* do no submit */
          e.preventDefault();

          /* call before submit hook. */
          /* if it returns false abort submitting */
          if (false !== onsubmit.apply(form, [settings, self])) {
            /* custom inputs call before submit hook. */
            /* if it returns false abort submitting */
            if (false !== submit.apply(form, [settings, self])) {

              /* check if given target is function */
              if ($.isFunction(settings.target)) {
                var str = settings.target.apply(self, [input.val(), settings]);
                $(self).html(str);
                self.editing = false;
                callback.apply(self, [self.innerHTML, settings]);
                /* TODO: this is not dry */
                if (!$.trim($(self).html())) {
                  $(self).html(settings.placeholder);
                }
              } else {
                /* add edited content and id of edited element to POST */
                var submitdata = {};
                submitdata[settings.name] = input.val();
                submitdata[settings.id] = self.id;
                /* add extra data to be POST:ed */
                if ($.isFunction(settings.submitdata)) {
                  $.extend(submitdata, settings.submitdata.apply(self, [self.revert, settings]));
                } else {
                  $.extend(submitdata, settings.submitdata);
                }

                /* quick and dirty PUT support */
                if ('PUT' == settings.method) {
                  submitdata['_method'] = 'put';
                }

                /* show the saving indicator */
                $(self).html(settings.indicator);

                /* defaults for ajaxoptions */
                var ajaxoptions = {
                  type:'POST',
                  data:submitdata,
                  dataType:'html',
                  url:settings.target,
                  success:function (result, status) {
                    if (ajaxoptions.dataType == 'html') {
                      $(self).html(result);
                    }
                    self.editing = false;
                    callback.apply(self, [result, settings]);
                    if (!$.trim($(self).html())) {
                      $(self).html(settings.placeholder);
                    }
                  },
                  error:function (xhr, status, error) {
                    onerror.apply(form, [settings, self, xhr]);
                  }
                };

                /* override with what is given in settings.ajaxoptions */
                $.extend(ajaxoptions, settings.ajaxoptions);
                $.ajax(ajaxoptions);

              }
            }
          }

          /* show tooltip again */
          $(self).attr('title', settings.tooltip);

          return false;
        });
      });

      /* privileged methods */
      this.reset = function (form) {
        /* prevent calling reset twice when blurring */
        if (this.editing) {
          /* before reset hook, if it returns false abort reseting */
          if (false !== onreset.apply(form, [settings, self])) {
            $(self).html(self.revert);
            self.editing = false;
            if (!$.trim($(self).html())) {
              $(self).html(settings.placeholder);
            }
            /* show tooltip again */
            if (settings.tooltip) {
              $(self).attr('title', settings.tooltip);
            }
          }
        }
      };
    });

  };


  $.editable = {
    types:{
      defaults:{
        element:function (settings, original) {
          var input = $('<input type="hidden"></input>');
          $(this).append(input);
          return(input);
        },
        content:function (string, settings, original) {
          $(':input:first', this).val(string);
        },
        reset:function (settings, original) {
          original.reset(this);
        },
        buttons:function (settings, original) {
          var form = this;
          if (settings.submit) {
            /* if given html string use that */
            if (settings.submit.match(/>$/)) {
              var submit = $(settings.submit).click(function () {
                if (submit.attr("type") != "submit") {
                  form.submit();
                }
              });
              /* otherwise use button with given string as text */
            } else {
              var submit = $('<button type="submit" />');
              submit.html(settings.submit);
            }
            $(this).append(submit);
          }
          if (settings.cancel) {
            /* if given html string use that */
            if (settings.cancel.match(/>$/)) {
              var cancel = $(settings.cancel);
              /* otherwise use button with given string as text */
            } else {
              var cancel = $('<button type="cancel" />');
              cancel.html(settings.cancel);
            }
            $(this).append(cancel);

            $(cancel).click(function (event) {
              //original.reset();
              if ($.isFunction($.editable.types[settings.type].reset)) {
                var reset = $.editable.types[settings.type].reset;
              } else {
                var reset = $.editable.types['defaults'].reset;
              }
              reset.apply(form, [settings, original]);
              return false;
            });
          }
        }
      },
      text:{
        element:function (settings, original) {
          var input = $('<input />');
          if (settings.width != 'none') {
            input.width(settings.width);
          }
          if (settings.height != 'none') {
            input.height(settings.height);
          }
          /* https://bugzilla.mozilla.org/show_bug.cgi?id=236791 */
          //input[0].setAttribute('autocomplete','off');
          input.attr('autocomplete', 'off');
          $(this).append(input);
          return(input);
        }
      },
      textarea:{
        element:function (settings, original) {
          var textarea = $('<textarea />');
          if (settings.rows) {
            textarea.attr('rows', settings.rows);
          } else if (settings.height != "none") {
            textarea.height(settings.height);
          }
          if (settings.cols) {
            textarea.attr('cols', settings.cols);
          } else if (settings.width != "none") {
            textarea.width(settings.width);
          }
          $(this).append(textarea);
          return(textarea);
        }
      },
      select:{
        element:function (settings, original) {
          var select = $('<select />');
          $(this).append(select);
          return(select);
        },
        content:function (data, settings, original) {
          /* If it is string assume it is json. */
          if (String == data.constructor) {
            eval('var json = ' + data);
          } else {
            /* Otherwise assume it is a hash already. */
            var json = data;
          }
          for (var key in json) {
            if (!json.hasOwnProperty(key)) {
              continue;
            }
            if ('selected' == key) {
              continue;
            }
            var option = $('<option />').val(key).append(json[key]);
            $('select', this).append(option);
          }
          /* Loop option again to set selected. IE needed this... */
          $('select', this).children().each(function () {
            if ($(this).val() == json['selected'] ||
              $(this).text() == $.trim(original.revert)) {
              $(this).attr('selected', 'selected');
            }
          });
        }
      }
    },

    /* Add new input type */
    addInputType:function (name, input) {
      $.editable.types[name] = input;
    }
  };

  // publicly accessible defaults
  $.fn.editable.defaults = {
    name:'value',
    id:'id',
    type:'text',
    width:'auto',
    height:'auto',
    event:'click.editable',
    onblur:'cancel',
    loadtype:'GET',
    loadtext:'Loading...',
    placeholder:'Click to edit',
    loaddata:{},
    submitdata:{},
    ajaxoptions:{}
  };

})(jQuery);
